635994 has 24 divisors (see below), whose sum is σ = 1396980. Its totient is φ = 209088.

The previous prime is 635989. The next prime is 636017. The reversal of 635994 is 499536.

635994 is a `hidden beast` number, since 63 + 599 + 4 = 666.

635994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 632025 + 3969 = 795^2 + 63^2 .

It is a d-powerful number, because it can be written as 6⁵ + 3⁷ + 9² + 5⁷ + 9⁶ + 4⁷ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 635994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1404 + ... + 1800.

2⁶³⁵⁹⁹⁴ is an apocalyptic number.

635994 is an abundant number, since it is smaller than the sum of its proper divisors (760986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

635994 is a wasteful number, since it uses less digits than its factorization.

635994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 491 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 635994 is about 797.4923197122. The cubic root of 635994 is about 85.9972056060.

The spelling of 635994 in words is "six hundred thirty-five thousand, nine hundred ninety-four".